The tribals belonging to four affected villages - Amilia, Nagva, Karkua and Vidher- staged the protest yesterday,holding placards like "Greenpeace go back" among others.
The protesters agitated before the office at Waidhan tehsil of the district, for nearly half-an-hour and later went back.
Greenpeace's protest against Mahan project is not justified because if the company shuts down its operations then the people (working in the project) will have to face lot of hardship, especially on the employment front, Rajiv Pratap, who led the group told reporters.
She also termed the latest report of the Intelligence Bureau, "Impact of NGOs on development", terming Greenpeace and other NGOs as "Anti-development", as an attempt to silence its voice.
Pillai said that Greenpeace will continue its fight against the violation of people's right and for environment.
The coal mine project is located at Waidhan, nearly 44 kms from here.